ABB | SACE Emax 2
Mechanical accessories | 7 - Installation
287 | © 2017 ABB | 1SDH001330R0002 - ECN000058721 Rev. A
Connection to the power circuit
The connection of a circuit-breaker to the power circuit is performed using the connection busbars of the
electric switchgear fixed to the terminals of the circuit-breaker. The sizing of the busbars is specified by the
designer of the electrical switchgear.
IMPORTANT: before proceeding with the connection between terminals and connection
busbars:
•
Make sure that the contact surfaces of the busbars are free of burrs, dents, traces of
rusting, dust or traces of grease.
•
Make sure, if aluminium busbars are used, than they are tin plated in the contact areas.
•
Make sure that the busbars do not exert forces in any direction on the terminal.
•
Tightening: for E1.2 use M10 screws with resistance class 8.8 equipped with spring
washers and lock them with a torque of 45 Nm - 398.3 lb in
•
Tightening: for E2.2-E4.2-E6.2 use M12 screws with resistance class 8.8 equipped with
spring washers and lock them with a torque of 70 Nm - 619.5 lb in
IMPORTANT: it is possible to obtain different capacities for the connections by altering
the thickness and number of busbars in parallel.
NOTE:
the information on the performances of the circuit-breakers in switchboards is available
on the website:
http://new.abb.com/low-voltage/products/circuit-breakers/emax2.
The connection for the E1.2 circuit-breaker is shown below as swell as the tables with some examples of the
amount and sizes of the connections that can be used for each type of circuit-breaker:
Figure 96
Figure 97
circuit-breaker IEC 60947
Iu (A)
Dimension of
busbars (mm)
Horizontal
terminals
Vertical
terminals
E1.2
630
2x40x5
yes
yes
E1.2
800
2x50x5
yes
yes
E1.2
1000
2x50x10
yes
-
2x50x8
-
yes
E1.2
1250
2x50x10
yes
-
2x50x8
-
yes
E1.2
1600
3x50x8
yes
-
2x50x10
-
yes
circuit-breaker UL 1066
Iu (A)
Dimension of
busbars (inches)
Horizontal
terminals
Vertical
terminals
E1.2-A
800
1x1/4x3
-
yes
2x1/4x2
yes
-
E1.2-A
1200
2x1/4x2
-
yes
3x1/4x2
yes
-
Continued on the next page
Summary of Contents for SACE Emax E1.2
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